Who can Explain The Feeling Of Disgust, Remorse And Disdain After Sex.?

Every guy feels this exciting, joy and enthusiasm before sex but immediately after, it is the opposite of all the feelings before it.

I ain't concluding, it may not be so for other guys. Even so Can someone explain why some of us few like that? Even with the girls I love wholeheartedly I still feel like that with them. is it a biological, psychological or emotional problem? and what is the remedy?